PLM Power Driven H-Series Ramhorn 4-1 Header – H22 & F20B

PLM Power Driven H-Series Ramhorn 4-1 Header – H22 & F20B

SKU: PLM-H2B-RH-HEADER-KIT

Product Description

Unlock the full potential of your H-Series engine with the PLM H-Series Ramhorn 4-1 Header, designed for enthusiasts who demand maximum performance and precision engineering. Crafted from 304 stainless steel with hand TIG welding, this long-tube header delivers exceptional exhaust flow, increased horsepower, and an aggressive engine note while maintaining reliability and durability.

Featuring a 4-1 merge collector and a true 2.5" exhaust collector, this header is built to optimize mid- to high-range power while reducing backpressure. Its CNC-machined 0.38" thick flanges and 18-gauge mandrel-bent tubing ensure a perfect fit and smooth airflow. The two-piece slip-fit design simplifies installation and allows fine-tuning for the ideal height and alignment in H-Series swaps or Prelude builds.

Perfect for H22, F20B engines, or H-Series swap projects, this header delivers performance gains, precision fitment, and long-lasting quality, making it a top choice for autocross, road racing, or spirited street driving.

Key Features

• Premium 304 stainless steel construction

• Long-tube 4-1 Ramhorn design for improved exhaust flow

• True 2.5" exhaust collector

• CNC-machined manifold flanges, 0.38" thick

• 18-gauge mandrel-bent tubing for optimal airflow

• Hand TIG welded for durability and precision

• Two-piece slip-fit design for easier installation

• Includes gaskets and hardware

• One-year limited warranty

Vehicle Fitment

• Honda H22 VTEC engines

• Honda F20B engines

• H-Series swap vehicles

• Honda Prelude (requires aftermarket or notched front crossmember)

Installation Notes

• Adjustable header height with included double-nut locking system

• Recommended for H-Series motors and Prelude swap builds

• Preludes may require aftermarket front crossmember or crossmember notch